<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #drag-drop-wrapper {
            display: none;
        }
        .drag-item {
            text-align: center;
            background-color: red;
            margin: 5px;
        }
    </style>
</head>
<body>
    <h1>WebSocket</h1>

    <div id="drag-drop-wrapper">
        <div id="dest-wrapper" style="width: 300px;height: 500px; background-color: coral;float: right;">
            <h1>dest-wrapper</h1>
        </div>
        <div id="src-wrapper" style="width: 300px;height: 500px; background-color: orchid;">
            <h1>src-wrapper</h1>
            <p class="drag-item" draggable="true">1111</p>
            <p class="drag-item" draggable="true">2222</p>
            <p class="drag-item" draggable="true">3333</p>
            <p class="drag-item" draggable="true">4444</p>
            <p class="drag-item" draggable="true">5555</p>
        </div>
    </div>

    <!--  -->

    <script src="./dragdrop.js"></script>
    <script src="./ws.js"></script>
</body>
</html>